The phenomenon of photoelectric effect is used in the following EXCEPT

Johnnevy

3 years ago

The phenomenon of photoelectric effect is used in the following EXCEPT
A. automatic doors
B. bugler alarm
C. electric fire alarm
D. sound production from film tracks
E. television cameras

All above except electric fire am found application in photoelectric effect.

Electric fire arm find application in Expansivity. it works in the principle of heath which makes the metal to expand to make contact with the alarm during fire outbreak.

Onamenna

4 years ago

C is the right answer ref pg 488 new school physics